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公开(公告)号：US10446928B2
公开(公告)日：2019-10-15
申请号：US16342061
申请日：2018-06-07
发明人： Tomohiro Takahashi
摘要： A phased array antenna includes a signal source, a distribution circuit, phase shifters, amplifiers, antenna elements, and a control device. The signal source generates a signal. The distribution circuit divides the signal generated by the signal source. The phase shifters shift phases of signals divided by the distribution circuit to change an orientation direction in which electromagnetic wave is emitted. The amplifiers amplify signals output by the phase shifters. The antenna elements emit, as the electromagnetic wave, signals output by the amplifiers. The control device controls the amplifiers such that, in a plane that is parallel to an orbital plane of a satellite with which communication of the electromagnetic wave is established, amplitudes of amplifiers, among the amplifiers, which are arranged in the center of the plane are greater than amplitudes of amplifiers, among the amplifiers, arranged at the periphery.
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公开(公告)号：US10027011B2
公开(公告)日：2018-07-17
申请号：US15322767
申请日：2015-08-31
发明人： Akimichi Hirota , Yukihiro Tahara , Takashi Maruyama , Tomohiro Takahashi , Kazuyoshi Yamashita
摘要： The waveguide device, in which first/second openings are formed at end parts of a waveguide path, comprises a waveguide path obtained by uniting first/second waveguides. The first waveguide is provided with a first recessed part which has an opening with a same shape as the first opening and has a bottom part formed in a first direction as seen from the opening. The second waveguide is provided with a second recessed part which has an opening with a same shape as the second opening and has a bottom part formed in a second direction as seen from the opening. The first/second waveguides are united in a manner such that, positions of the bottom parts of the first/second recessed parts are different from each other in a direction differing from the first/second directions, and the first/second recessed parts connect with each other at the respective bottom parts.
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公开(公告)号：USD1028951S1
公开(公告)日：2024-05-28
申请号：US29822520
申请日：2022-01-10
设计人： Kei Yokokawa , Narihiro Nakamoto , Toru Fukasawa , Hitoshi Arai , Tomohiro Takahashi , Kensuke Iwaki , Takamichi Kono , Keisuke Fujiwara , Kenjiro Takanishi , Tatsuya Sakamoto , Naoya Noguchi
摘要： FIG. 1 is a perspective view of an antenna showing our new design;
FIG. 2 is a front view thereof;
FIG. 3 is a rear view thereof;
FIG. 4 is a top plan view thereof; a bottom view being a minor image;
FIG. 5 is a right side view thereof; a left side view being a minor image;
FIG. 6 is an enlarged view of 6-6 part shown in FIG. 2 thereof;
FIG. 7 is an enlarged view of 7-7 part shown in FIG. 3 thereof;
FIG. 8 is an end view of cutting part at 8-8 of FIG. 6 thereof; and,
FIG. 9 is an enlarged view of 9-9 part shown in FIG. 8 thereof.
The broken lines shown represent portions of the antenna and form no part of the claimed design.
The dot-dash broken lines illustrate a boundary of the claimed design and form no part of the claimed design.-
公开(公告)号：US20240347924A1
公开(公告)日：2024-10-17
申请号：US18751593
申请日：2024-06-24
发明人： Shunichi Ikeda , Narihiro Nakamoto , Hiromasa Nakajima , Tomohiro Takahashi , Toru Fukasawa , Naoya Noguchi
摘要： In a conventional antenna device, transmission radio waves transmitted from a transmitting antenna traveling directly to a receiving antenna are blocked by a shield wall disposed between the receiving antenna and the transmitting antenna. However, some of the transmission radio waves are diffracted at the edge of the shield wall and enter the receiving antenna as diffracted waves, affecting the reception of the reception radio waves. In view of this, the shield wall and a polarized wave converter unit are disposed between the transmitting antenna unit and the receiving antenna unit. As a result, vertically polarized wave components of the diffracted waves are converted by the polarized wave converter unit to circularly polarized wave components that are less affecting the reception of the reception radio waves in the receiving antenna, and the diffracted waves are prevented from affecting the receiving operation of the receiving antenna.
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公开(公告)号：US11901632B2
公开(公告)日：2024-02-13
申请号：US17605231
申请日：2020-03-26
发明人： Tomohiro Takahashi
CPC分类号： H01Q21/06 , G01S3/42 , H01Q3/2605 , H01Q3/36 , H01Q21/24
摘要： A phased array antenna device for receiving a signal from a satellite includes subarrays including antenna elements and phase shifters that shift phases of signals received by the antenna elements with set phase shift values, a demodulator that demodulates the signals from the satellite with the phases shifted by the phase shifters and outputs the demodulated signals, and a controller that sets the phase shift values of the phase shifters and controls a beam direction. The controller calculates, for each of the subarrays, a direction-correction phase shift value that maximizes a power value of the signal from the satellite by being added to the phase shift values of the phase shifters included in the subarray and adds the direction-correction phase shift value to the phase shift values of the phase shifters included in the subarray.
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公开(公告)号：US11271434B2
公开(公告)日：2022-03-08
申请号：US17291622
申请日：2019-09-11
摘要： A rectenna device includes an antenna (210), a first rectifier (31) to rectify a radio frequency wave input in the antenna (210), an antenna (220), a second rectifier (32) to rectify a radio frequency wave input in the antenna (220), and a capacitive coupler (5) to form an open circuit in response to direct current and to form a short circuit in response to a fundamental wave. The first rectifier (31) includes a ground (GND) conductor (410) to be a reference potential, and the second rectifier (32) includes a GND conductor (420) to be a reference potential. The GND conductor (410) and the GND conductor (420) are connected with the capacitive coupler (5) in between. The first rectifier (31) and the second rectifier (32) are connected in series.
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公开(公告)号：US10992039B2
公开(公告)日：2021-04-27
申请号：US16327648
申请日：2016-08-30
发明人： Kei Yokokawa , Jun Goto , Kazunari Kihira , Tomohiro Takahashi , Masataka Otsuka , Narihiro Nakamoto , Toru Fukasawa , Takuro Sasaki , Tomohiro Mizuno
摘要： An array antenna device, including: a waveguide (1) having a plurality of radiation units (2) arranged on one tube wall thereof, in which the waveguide (1) has a plurality of grooves (3) arranged on an inner side of a tube wall facing the tube wall, movable short-circuit surfaces (4) each electrically short-circuited to an inner wall of one of the grooves (3), and movable short-circuit surface controlling mechanisms (5) for changing positions of the movable short-circuit surfaces (4).
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公开(公告)号：US10680307B2
公开(公告)日：2020-06-09
申请号：US16308585
申请日：2017-06-05
发明人： Motomi Watanabe , Shinji Arai , Tomohiro Takahashi , Takeshi Oshima , Takeshi Yuasa , Takuma Nishimura , Hidenori Yukawa
摘要： A substrate is used as one tube wall of a hollow waveguide, the substrate including a strip line wired in an inner layer, a first ground surface formed on a front surface, and a second ground surface formed on a part of a back surface. As a result of such a configuration, a waveguide strip line transducer having the same dimension as the external dimension of the hollow waveguide can be obtained.
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公开(公告)号：US10027031B2
公开(公告)日：2018-07-17
申请号：US15511435
申请日：2016-05-31
发明人： Shinji Arai , Tomohiro Takahashi
摘要： Lower-limit frequency reflection characteristics of a horn antenna are improved even though element spacing, of less than or equal to one wavelength, is a spacing at which grating lobes do not occur in an antenna radiation pattern. The horn antenna includes a horn antenna and a conductor grid that divides an aperture A of the horn antenna in a grid pattern and that electrically connects to an inner surface of the horn antenna at the aperture A of the horn antenna. Width of the conductor grid in a direction orthogonal to a horn antenna aperture plane differs from electrical length of the path of the horn antenna of the conductor grid portion at the frequency of power supplied to the horn antenna.
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公开(公告)号：US11621482B2
公开(公告)日：2023-04-04
申请号：US17615840
申请日：2019-06-24
发明人： Kei Yokokawa , Narihiro Nakamoto , Toru Fukasawa , Hitoshi Arai , Tomohiro Takahashi , Kensuke Iwaki , Takamichi Kono , Keisuke Fujiwara
摘要： A conductor ground plane provided on a dielectric substrate and provided with a patch antenna and a conductor ground plane provided on the side of a dielectric substrate having a through hole are bonded by solder in a state where the through hole and the patch antenna are arranged to face each other, and a conductor ground plane provided on the back side of the dielectric substrate and a conductor ground plane provided on a dielectric substrate are bonded by solder.
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